Solar lamp



FIG. 1 is a perspective view of a solar lamp, showing my new design;

FIG. 2 is a front elevational view thereof, the rear elevation view is a mirror image of the front elevation view;

FIG. 3 is a left elevational view thereof;

FIG. 4 is a right elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a solar lamp, as shown and described. 